Rapping device of waste heat boiler

Abstract

The utility model provides a rapping device of a waste heat boiler. The rapping device comprises a driving rod, a plurality of rapping mechanisms, a plurality of impact structures, a plurality of sealing structures and a plurality of connecting structures. The plurality of rapping mechanisms are arranged on the driving rod, and the driving rod is used for driving the rapping mechanisms to rotate; the impact structures are arranged on the outer wall of the boiler, the impact end of each rapping mechanism penetrates through the outer wall of the boiler, the outer side end of each impact structure directly faces the hammering end of the corresponding rapping mechanism, the inner side end of each impact structure is used for cleaning ash, and the hammering end of each rapping mechanism is of a spherical structure. According to the rapping device of the waste heat boiler, the problem that accumulated dust in the boiler and particulate matter in smoke cannot be effectively cleaned due to the fact that the joint of the rapping rod and the rapping hammer of the rapping device in the related technology is prone to fatigue fracture is solved.

Description

Technical Field

[0001] The utility model belongs to the field of boiler ash removal, and particularly relates to a vibration device for a waste heat boiler. Background Technique

[0002] Mechanical vibration devices are widely used in industrial waste heat boilers. As the main ash cleaning devices of boilers, they are mainly applied to industrial waste gas occasions where the dust in the waste gas has low viscosity and low moisture content, and can achieve good ash cleaning effects. A set of mechanical vibration devices is arranged on each layer of the heating surface of the boiler, and each set of vibration devices is provided with a plurality of mechanical vibration mechanisms. Since the device has low power consumption (usually the power of the vibration motor is 1.1 kW), low manufacturing cost, and good ash cleaning effect. However, in actual engineering applications, the vibration rods often break. Due to the fatigue fracture prone to occur at the connection between the vibration rods and the vibration hammers in the vibration devices in the related technologies, the problem that the ash accumulation in the boiler and the particulate matter in the flue gas cannot be effectively cleaned occurs.

[0003] In the related technologies, the internal impact rod and the external impact rod of the boiler are designed separately. The external impact rod transmits the impact action of the vibration hammer to the inside of the boiler by impacting the vibration disc on the internal impact rod of the boiler. Due to the influence of installation or temperature differences inside and outside, etc., when the external impact rod impacts the internal vibration disc, it cannot ensure the coaxial transmission of the impact force, resulting in the impact force deviating from the center position of the disc, making the force on the disc unreasonable and often causing the disc to fall off.

[0004] In addition, the internal vibration device of the boiler in the related technologies penetrates the boiler wall. The impact rod needs to make an impact movement. Usually, a circular pipe is used to pass the impact rod, and heat insulation materials are laid outside the circular pipe, resulting in a gap between the impact rod and the circular pipe. Furthermore, the circular pipe of the vibration device has poor sealing and air leakage. The boiler operates under negative pressure, and cold air in the environment enters the boiler, causing the temperature of the waste gas to decrease, reducing the available energy of the waste heat resource of the waste gas, and reducing the utilization efficiency of the waste heat resource. Summary of the Invention

[0005] In view of this, the utility model aims to solve at least one of the related technical problems to a certain extent.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A vibration device for a waste heat boiler, comprising a driving rod, a plurality of vibration mechanisms, a plurality of impact structures, a plurality of sealing structures and a plurality of connection structures;

[0008] The plurality of vibration mechanisms are arranged on the driving rod, and the driving rod is used to drive the vibration mechanisms to rotate;

[0009] A plurality of the impact structures are arranged on the outer wall of the boiler. The impact end of each vibration knocking mechanism penetrates through the outer wall of the boiler. The outer end of each impact structure faces the hammering end of one of the vibration knocking mechanisms. The inner end of each impact structure is used for ash cleaning. The hammering end of the vibration knocking mechanism is a spherical structure;

[0010] Each impact structure is connected to the outer wall of the boiler through one of the connection structures. A sealing structure is correspondingly arranged at the position where each vibration knocking mechanism is connected to the outer wall of the boiler.

[0011] Further, the outer end of the impact structure is a curved surface. When the vibration knocking mechanism hammers the outer end of the impact structure, the hammering end of the vibration knocking mechanism and the axis of the impact structure are located on the same axis line.

[0012] Further, the vibration knocking mechanism includes a connecting rod, a vibration knocking rod, a vibration knocking ball and a lifting lug. One end of the connecting rod is detachably connected to the driving rod. The other end of the connecting rod is hinged to the vibration knocking rod. The end of the vibration knocking rod away from the connecting rod is hinged to the vibration knocking ball through the lifting lug.

[0013] Further, the impact structure includes an impact rod, a first guiding structure, a fixed disc, a convex disc, a second guiding structure and a reset elastic structure. The impact rod penetrates through the outer wall of the boiler. The impact rod is slidably connected to the first guiding structure and the second guiding structure. The convex disc is arranged on the outer wall of the impact rod. One end of the reset elastic structure abuts against the fixed disc, and the other end of the reset elastic structure abuts against the convex disc. The outer end of the impact rod is a curved surface. The vibration knocking ball is used to hammer the curved surface.

[0014] Further, the guiding structure includes an annular guiding block and a plurality of rolling balls. The inner side of the annular guiding block is slidably matched with the outer wall of the impact rod through the plurality of rolling balls.

[0015] Further, a sealing cavity is provided on the outer wall of the boiler. The impact rod penetrates through the sealing cavity. The sealing structure is arranged in the sealing cavity. The sealing structure is a labyrinth sealing structure.

[0016] Further, the connection structure includes a first support plate and a second support plate. The top of the first guiding structure is connected to the outer wall of the boiler through the first support plate. The bottoms of the first guiding structure and the second guiding structure are connected to the outer wall of the boiler through the second support plate.

[0017] Further, a heat preservation structure is provided on the outer side of the sealing cavity.

[0018] Compared with the prior art, the vibration knocking device of the waste heat boiler of the present invention has the following advantages:

[0019] 1. The hammering end of the rapping mechanism and the axis of the impact structure are on the same axis line, which can ensure that the stress borne by each component during rapping is evenly distributed, reduce local stress concentration, and thus reduce the risk of fatigue fracture of the components.

[0020] 2. By reducing the rapping rods and rapping discs inside the boiler, the impact of vibration on the internal structure of the boiler is reduced, and equipment wear and failures caused by vibration are avoided. The impact rods inside and outside the boiler are optimized into one, reducing the vibration transmission path and influence, thereby improving the overall stability of the equipment. Canceling the rapping disc simplifies the structure of the rapping and dust cleaning device, making the device more reliable and reducing possible failure points. The structural simplification and the reduction of failure rate directly lead to a reduction in the consumption of spare parts, thus reducing the maintenance and operation costs.

[0021] 3. The sealing treatment of the mechanical rapping device is strengthened, reducing the air leakage of the boiler, which is beneficial to the efficient operation of the boiler. The sealing structure can effectively prevent the air in the low-temperature environment outside the boiler from entering the boiler, causing a reduction in the effective heat of the boiler, an increase in the boiler flue gas volume, and an increase in the power consumption of the fan, improving the economy of the system. Description of the Drawings

[0022] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0023] Figure 1 Schematic diagram of a rapping device for a waste heat boiler according to an embodiment of the present utility model;

[0024] Figure 2 Cross-sectional view of a rapping device for a waste heat boiler according to an embodiment of the present utility model;

[0025] Figure 3 Side view of a rapping device for a waste heat boiler according to an embodiment of the present utility model.

[0026] Description of the reference numerals:

[0027] 1. Driving shaft; 2. Connecting rod; 3. Rapping rod; 4. Lifting lug; 5. Rapping ball; 6. Impact rod; 6a. Raised disc; 7. First guiding structure; 8. Reset elastic structure; 9. Fixed disc; 10. Second support plate; 11. First support plate; 12. Second guiding structure; 13. Sealing cavity; 14. Heat preservation structure; 15. Boiler outer wall. Detailed Embodiments

[0028] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0031] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0032] A rapping device for a waste heat boiler, as Figure 1As shown in the figure, it includes a drive rod, multiple rapping mechanisms, multiple impact structures, multiple sealing structures and multiple connecting structures; the multiple rapping mechanisms are arranged on the drive rod, and the drive rod is used to drive the rapping mechanisms to rotate; the multiple impact structures are arranged on the outer wall 15 of the boiler, the impact end of each rapping mechanism penetrates through the outer wall 15 of the boiler, the outer end of each impact structure is aligned with the hammering end of a rapping mechanism, the inner end of each impact structure is used for ash cleaning, and the hammering end of the rapping mechanism is a spherical structure; each impact structure is connected to the outer wall 15 of the boiler through a connecting structure, and a sealing structure is correspondingly arranged at the position where each rapping mechanism is connected to the outer wall 15 of the boiler. The outer wall 15 of the boiler is provided with a sealing cavity 13, the impact rod 6 penetrates through the sealing cavity 13, the sealing structure is arranged in the sealing cavity 13, and the sealing structure is a labyrinth sealing structure. A heat preservation structure 14 is arranged outside the sealing cavity 13. The sealing treatment of the mechanical rapping device is strengthened, the air leakage of the boiler is reduced, which is beneficial to the efficient operation of the boiler. The sealing structure can effectively prevent the air in the low-temperature environment outside the boiler from entering the boiler, which causes the reduction of the effective heat of the boiler, the increase of the boiler flue gas discharge, and the increase of the fan power consumption, and improves the economy of the system. The sealing structure ensures the free movement of the impact rod 6 along the axis, and the ambient air cannot leak into the boiler.

[0033] As Figure 2 shown, the outer end of the impact structure is a curved surface. When the rapping mechanism hammers the outer end of the impact structure, the hammering end of the rapping mechanism and the axis of the impact structure are on the same axis; since the rapping ball 5 is a sphere and the contact surface between the impact rod 6 and the rapping ball 5 is set as a curved surface, when the rapping hammer strikes the impact rod 6, it is a point contact, and the connection line between the contact point and the center of gravity of the rapping ball 5 is coaxial with the impact rod 6, so that the rapping hammer ball does not generate a bending force on the lifting lug 4 during impact, thereby reducing the fatigue damage caused by bending stress. It can ensure that the stress borne by each component during the rapping process is evenly distributed, reduce local stress concentration, and thus reduce the risk of fatigue fracture of the component.

[0034] The impact structure includes an impact rod 6, a first guiding structure 7, a fixed disk 9, a convex disk 6a, a second guiding structure 12, and a reset elastic structure 8. The impact rod 6 penetrates through the outer wall of the boiler 15. The impact rod 6 is slidably connected to the first guiding structure 7 and the second guiding structure 12. The convex disk 6a is arranged on the outer wall of the impact rod 6. One end of the reset elastic structure 8 abuts against the fixed disk 9, and the other end of the reset elastic structure 8 abuts against the convex disk 6a. The outer end of the impact rod 6 is a curved surface, and the vibration ball 5 is used to hammer the curved surface. The guiding structure includes an annular guiding block and a plurality of balls. The inner side of the annular guiding block is slidably matched with the outer wall of the impact rod 6 through the plurality of balls. Under the knocking action of the vibration ball 5, the impact rod 6 moves forward along the axis, the reset elastic structure 8 deforms, the impact rod 6 slowly stops moving forward, and then recovers the deformation through the compressive deformation of the reset elastic structure 8, pushing the impact rod 6 back to the original position. The reset elastic structure 8 is a spring. The guiding structure enables the impact rod 6 to generate a horizontal impact effect and maintains a perpendicular relationship with the outer wall of the boiler.

[0035] By reducing the vibration rods and vibration disks inside the boiler, the impact structure reduces the impact of vibration on the internal structure of the boiler, avoiding equipment wear and failures caused by vibration. Optimizing the impact rod 6 inside and outside the boiler into one reduces the vibration transmission path and influence, thereby improving the overall stability of the equipment. Canceling the vibration disk simplifies the structure of the vibration cleaning device, making the device more reliable and reducing possible failure points. The structural simplification and the reduction of the failure rate directly lead to a reduction in the consumption of spare parts, thereby reducing the maintenance and operation costs.

[0036] The vibration mechanism includes a connecting rod 2, a vibration rod 3, a vibration ball 5, and a lifting lug 4. One end of the connecting rod 2 is detachably connected to the driving rod, the other end of the connecting rod 2 is hinged to the vibration rod 3, and the end of the vibration rod 3 far from the connecting rod 2 is hinged to the vibration ball 5 through the lifting lug 4. In this embodiment, the center of gravity of the vibration connecting rod 2 coincides with the connection point of the lifting lug 4. When the vibration ball 5 impacts the impact rod 6, the vibration ball 5 stops moving forward. At this time, the impact rod 6 generates a forward centrifugal force under the action of inertia. When the center of gravity coincides with the connection point, no bending force is generated between the two points, naturally avoiding the occurrence of fatigue fracture due to bending stress. In addition, the vibration rod 3 is hinged. When the vibration ball 5 stops moving, the speed of the impact rod 6 has a buffering and decelerating effect, optimizing the force condition of the impact rod 6. At the same time, the lifting lug 4 can also buffer and decelerate forward, greatly reducing the impact at the connection between the lifting lug 4 and the vibration ball 5.

[0037] A plurality of rapping mechanisms are provided on the drive shaft 1. As the drive shaft 1 rotates, each rapping mechanism impacts the impact rod 6 at regular intervals. The number of rapping mechanisms can be appropriately adjusted according to the width of the boiler heating surface and the dust concentration in the flue gas. When the width of the boiler heating surface is relatively wide and the dust concentration in the flue gas is high, the number of rapping mechanisms is appropriately increased; conversely, the number of rapping mechanisms is decreased. This can effectively reduce the mass of each rapping ball 5, ensure good vibration ash cleaning effect, and at the same time keep the vibration motor power at a relatively low level.

[0038] The connection structure includes a first support plate 11 and a second support plate 10. The top of the first guiding structure 7 is connected to the boiler outer wall 15 through the first support plate 11, and the bottoms of the first guiding structure 7 and the second guiding structure 12 are connected to the boiler outer wall 15 through the second support plate 10.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rapping device for a waste heat boiler, characterized in that: It includes a driving rod, a plurality of vibration knocking mechanisms, a plurality of impact structures, a plurality of sealing structures and a plurality of connecting structures; The plurality of vibration knocking mechanisms are arranged on the driving rod, and the driving rod is used to drive the vibration knocking mechanisms to rotate; The plurality of impact structures are arranged on the outer wall of the boiler (15). The impact end of each vibration knocking mechanism penetrates through the outer wall of the boiler (15). The outer end of each impact structure is aligned with the hammering end of one vibration knocking mechanism. The inner end of each impact structure is used for ash cleaning, and the hammering end of the vibration knocking mechanism is a spherical structure; Each impact structure is connected to the outer wall of the boiler (15) through one connecting structure, and a sealing structure is correspondingly arranged at the position where each vibration knocking mechanism is connected to the outer wall of the boiler (15).

2. The rapping device of a waste heat boiler according to claim 1, characterized in that: The outer end of the impact structure is a curved surface. When the vibration knocking mechanism hammers the outer end of the impact structure, the hammering end of the vibration knocking mechanism and the axis of the impact structure are on the same axis line.

3. The rapping device of a waste heat boiler according to claim 1, characterized in that: The vibration knocking mechanism includes a connecting rod (2), a vibration knocking rod (3), a vibration knocking ball (5) and a lifting lug (4). One end of the connecting rod (2) is detachably connected to the driving rod, the other end of the connecting rod (2) is hinged to the vibration knocking rod (3), and the end of the vibration knocking rod (3) away from the connecting rod (2) is hinged to the vibration knocking ball (5) through the lifting lug (4).

4. The rapping device of a waste heat boiler according to claim 3, characterized in that: The impact structure includes an impact rod (6), a first guiding structure (7), a fixed disc (9), a raised disc (6a), a second guiding structure (12) and a reset elastic structure (8). The impact rod (6) penetrates through the outer wall of the boiler (15). The impact rod (6) is slidably connected to the first guiding structure (7) and the second guiding structure (12). The raised disc (6a) is arranged on the outer wall of the impact rod (6). One end of the reset elastic structure (8) abuts against the fixed disc (9), and the other end of the reset elastic structure (8) abuts against the raised disc (6a). The outer end of the impact rod (6) is a curved surface, and the vibration knocking ball (5) is used to hammer the curved surface.

5. The rapping device of a waste heat boiler according to claim 4, characterized in that: The guiding structure includes an annular guiding block and a plurality of rolling balls. The inner side of the annular guiding block is slidably matched with the outer wall of the impact rod (6) through the plurality of rolling balls.

6. The rapping device of a waste heat boiler according to claim 4, characterized in that: The outer wall of the boiler (15) is provided with a sealing cavity (13). The impact rod (6) penetrates through the sealing cavity (13). The sealing structure is arranged in the sealing cavity (13), and the sealing structure is a labyrinth sealing structure.

7. The rapping device of a waste heat boiler according to claim 4, characterized in that: The connecting structure includes a first support plate (11) and a second support plate (10). The top of the first guiding structure (7) is connected to the outer wall of the boiler (15) through the first support plate (11). The bottoms of the first guiding structure (7) and the second guiding structure (12) are connected to the outer wall of the boiler (15) through the second support plate (10).

8. The rapping device of a waste heat boiler according to claim 6, characterized in that: A heat preservation structure (14) is arranged outside the sealing cavity (13).

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